Driver issue with Windows 7 on imac without boot camp

Hi everyone,

I could use some insight here on an issue I'm having with an imac (20-inch, early 2009). I am not very computer savvy, so bear with me. I installed a new 250 GB SSD into this imac, along with 8 GB RAM, used a USB drive with Windows 7 64-bit on it and just straight up installed it into this imac, no boot camp or anything. Why? I don't know, it sounded quicker. I downloaded and installed NVIDIA drivers and this thing has been working great for the last month or two. Now out of nowhere I can only boot up in safe mode, regular boot up and repair both freeze at the "loading windows" page. Under "Devices and Printers" I see my webcam and PC both have yellow triangles with exclamation marks meaning "troubleshoot". I get the message "The driver for unknown device is not installed". In the Action Center I have messages saying "your webcam is not working properly because a compatable driver is not available for this version of windows" and "A new driver for your chipset is available, go online to download the update".

Ok so that's what I am currently working with. Windows Update will not open and when I click on the link to update the chipset I get the error message "Your computer was unable to download the solution at this time..". I have a good hard-wired internet connection.

I know apple supplies the drivers for windows, but when I go to open them it says my system is incompatible, probably because I didn't partition with boot camp.

So my question for you is, do I need to wipe the SSD, install Mac OS to boot camp to Windows or is there another way around this?

Thank you for any help!